Musannaf Ibn Abi Shayba 21:161

Muhammad ibn Bishr narrated to us, Mis'ar narrated to us, he said: Abu Aqil narrated to me, from Sabiq, from Abu Salam, the servant of the Messenger of Allah (may Allah bless him and grant him peace), that the Messenger of Allah (may Allah bless him and grant him peace) said: "There is no Muslim, or human, or servant who says when he reaches the evening and when he reaches the morning three times: 'I am pleased with Allah as a Lord, with Islam as a religion, and with Muhammad as a Prophet,' except that it is a duty upon Allah to please him on the Day of Resurrection."